Air filtering and cleansing device



Nov. 19, 1935. 1.. A. SONDBURG 2,021,524

AIR FILTERING AND CLEANSING DEVICE Filed June 24, 1955 2 Sheets-Sheet 1 Inventor jeonaruzflsondin Q By /4 A llomey Nov. 19, 1935. A. SONDBURG AIR FILTERING AND CLEANSING DEVICE 2 Sheets-Sheet 2 Filed June 24, 1935 In venlor xi? 1 .1 via Wm Paw!" A Home);

Patented Nov 19, 1935 PATENT OFFICE I ensure am mraame AND cmassmo navrca' Leonard A. Sandburg, Monument, Kane. Application June 24, iosslserm. No. 28,169

6 Claims. (01. 183-15) This invention relates to that class of appliances generally referred to in the trade as automotive accessories and it has more specific reference to a unique filtering device for attachment to a carburetor for the purpose of cleansing the air of extraneous particles, whereby to condition it for satisfactory delivery to the carburetor.

It is a matter of common knowledge that in dry and arid areas it is not at all uncommon for the carburetor of an automobile or the like to become so clogged with dust and grit as to destroy its effectiveness to the extent that it sometimes fails to function. As a result of this difierent types of devices have been employed for straining and filtering the incoming air so as to relieve it of dirt and extraneous matter such as would otherwise A accumulate in the air intake and form filth and sediment. Although various appliances have been perfected with a view toward satisfying the needs in this particular line of endeavor no structure has come to my attention which is aptly fitted for the purposes intended and insuresconstant and uniform operation of the carburetor. Under the circumstances I have, after considerable experimentation and forethought, perfected an arrangement, which I believe, transcends in efficiency and importance analagous structures and is susceptible of accomplishing what is desired in a highly satisfactory and dependable manner.

In reducing the preferred embodiment of the invention to actual practice, I have adopted and assembled a unique arrangement of parts calculated to accomplish the results sought in a feasible and practicable manner and to do this through the instrumentality of an adaptation which is simple and economical.

Other features and advantages will become more readily apparent from the following description and drawings:

In the drawings:

Figure 1 is an elevational view of a conventiona internal combustion engine or motor showing the carburetor, the air feed or lead-in pipe, and the filtering and cleansing attachment attached to said pipe.

Figure 2 is an enlarged sectional view on the plane of the line 22 of Figure 1.

- Figure 3 is a central sectional view through the receptacle unit.

Figure 4 is a top plan view of said receptacle unit.

Figure 5 is a bottom view of the removable filter accommodation cap or dome.

Referring to the general assemblage shown in Figure 1 the carburetor is denoted by the numeral 6 and the air feeding or intake pipe, which communicates with the carburetor, is denoted at I. The air cleansing device or attachment is separably mounted on the upper end of this pipe I.

The attachment as shown in Figure 2 comprises a receptacle 8 of appropriate proportion and shape, this being provided with a central tube whose lower end extends through the bottom to provide an attaching nipple 9 telescopically con- 10 nectible with the pipe I. The upper nd Hi extends above the rim portion of the receptacle so as to facilitate entrance of the air in a manner to be hereinafter described, This receptacle by way of the attaching nipple 9 becomes more or less a-1 permanentpart of the air delivery pipe or tube 1.

The removable lid or cover unit I I may be said to be in the form of a cap. It includes a dome por-' tion l2. connectible with a horizontal annulus l3 terminating in a depending rim which fits down in 20 a hood-like manner around and in spaced relation to the rim portion of the receptacle 8. The skirt or rim of the cap is corrugated circumferentially and the corrugations define intake flutes It. The numeral 15 designates radial circumferential 25 spaced lugs carried by the underside of the annulus l3 and resting down on the rim of the main receptacle. This provides the desired spaced relation and permits the air to enter at the point A and to fiow downwardly through the space B. 30

. The space B is partially formulated by the rim of the receptacle and by the shell or wall ii of the filtering cartridge. This cartridge comprises a screen I1 which is formed by perforating the metal top of the cartridge. As a matter of fact, 35 this screen H, the annulus l3 and the fluted skirt or rim ll are made of one piece of metal to which the dome portion I2 is connected. The shell I is also integral with the annulus and is provided in its bottom with a suitable mesh wire screen ll. These two screens in conjunction with the annular shell I6 form a cage or holder for the filler or packing material l9. This material may be in' the form of shredded steel, copper wire,'or some similar lightweight filtering material. The cart- 45 ridge also includes a central tubular member which fits over the tube It. Thus far it may be said that the primary part of the assemblage com prises the central tube equipped cup-like receptacle 8 with the dome cover I I having a lug equipped annulus l3 supported on the rim of. the receptacle and a fluted skirt fitting down in a hood-like manner around the rim ofthe receptacle, the annular portion I: having an annular cartridge properly filled and screened to serve as a filtering 55 unit, this cartridge fitting around the tube In. It is by this arrangement of parts that the air is causedto pass through the flutes I4 asindicated at A and then down through the space B and up through the filter where it is trapped in the compartment formed between the top of the filter and the dome H. The air then passes downwardly through the passage or tube D and through the pipe 1 into the carburetor.

It is desired to employ in conjunction with this assemblage a clean-out unit or insert. This comprises a circular pan 20 which is proportioned to fit snugly in the receptacle 8 and which is provided with a sleeve II to fit slidably over the tube III. This pan is adapted to contain a predetermined quanitity of oil or some similar fluid as indicated at ZI and the incoming air passes through this oil before it passes through the filter. The oil takes up considerable of the dust, particles and extraneous matter. The filter also ,traps certain of the particles as the air passes upwardly in the direction of the arrow. Then too, thefiltering material itself becomes more or less oil filled but the oil drips back into the oil in the pan and by removing the cover Ill and then taking the pan 20 out, the oil and dirt can be emptied and the pan can be put back with clean oil. This provides the means for cleaning the device and insuring efifective operation at all times.

I desire to emphasize the fact that the lower part of the skirt or cartridge extends well down into the oil and that it automatically cleans itself when the engine stops. In addition it will clean the air just as well standing still, does not have to be jolted over roads to splash the oil up on the filter in order to clean the air. This feature of construction is of outstanding importance and is a phase of the invention which, I believe, has contributed largely to the success which is now substantially guaranteed. Manifestly, therefore, it is a point worthy of consideration.

Needless to say, a structure of this type is well designed and effectively constructed to promote eificient operation and to at all times feed clean dustless air in the carburetor.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size and rearrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

Having thus described the invention, what is claimed as new is:

1. In a structure of the class described, a receptacle provided with air delivery andattaching means, a removable cover for said receptacle, said cover being provided with a porous filter hanging therefrom and depending into said receptacle, and said cover being provided at its bottom with a skirt-like rim corrugated to define a series of air feeding fiutesto facilitate unrestricted uniform delivery of air.

2. As a component part of an assemblage of 10 the classdescribed, a cover including a central dome, an annulus carried thereby and provided with a depending skirt, said skirt being circumferentially corrugated to define retaining and air feedingfiutes, and an annular cartridge connected to and-depending from said annulus beneath the dome portion of the cover and including an imperforate outer wall and upper. and lower screens together with a charge of filtering material confined between the screens.

3. In a structure of the class described, a receptacle provided with a central tube constructed for connection with an air delivery pipe, a pan fitted removably in said receptacle and having a central tube surrounding and removably connected with the first named tube, said pan being adapted to contain oil, a cover provided with a rim fitting over the rim portion of said receptacle, and provided with a screened filtering cartridge constructed to fit around said second named tube and to depend into the oil in the pan in spaced relation from the bottom of said connected with said pan and said first named means.

.5. In a structure of the class described, a. receptacle having an air-filtering'and cleansing means, an oil containing pan in said receptacle and cover means operatively connectable with 46 the receptacle and pan, said receptacle being provided additionally with means for delivering the filtered air into an associated carburetor.

6. In a structure of the class described, a. receptacle provided with air delivery and attaching 50 means, a removable cover for said receptacle, an oil pan fitted removably in the receptacle and having a central up-standing tube, said cover being provided with an annular filtering unit depending into the oil in said pan and constructed to fit snugly and removably around in said tube.

LEONARD A. SONDBURG. 

